Valve-grinding apparatus



H. F. .HNZENS VALVE GRINDING APPARATUS Nov.. Z5? 1924 Filed Sept. 8, 1922 5 Sheets-Sheet 2 i if H. F. VINZENS VALVE GRINDING APPARATUS Filed Sept. 8, 1929. 3 Sheets-Sheet 3 Patented Nov. 25, 1924.

UNITED STATES HERBERT F. VINZEN S, OF CHICAGO, ILLINOIS.

VALVE-GRINDING APEARATUS.

Application filed September 8, 1922. Serial No. 586,976.

To all 'whom t may co'ncewt:

Be it known that I, HERBERT F. VrNznNs, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Valve-Grinding Apparatus, of which the following is a specifica tion.

rlhis invention relates to apparatus for grinding the valves of motor Vehicle engines, and its object is to provide a novel and improved apparatus of this kind by the use of which it is made possible to rapidly and accurately grind the valves, the construction and operation of the apparatus being such that a plurality of valves may be operated on at the same time, and the apparatus being also adjustable for operation on different types of motors.

YVith the objects stated in view, the invention consists in a novel combination and arrangement of parts to be hereinafter described and claimed, and in order that the same may be better understood, reference is had to the accompanying drawings, where- Figure 1 is a side elevation of the apparatus; Fig. 2 is an end view thereof; Fig. 3 is an enlarged vertical section on the line 3-3 of Fig. 1; Fig. 4 is an enlarged horizontal section on the line 4.--4 of Fig. 1, Fig. 5 is an enlarged horizontal section on the line 5--5 of Fig. 1, and Fig. 6 is a sectional detail showing certain gear supporting means.

Referring specifically to the drawings, 1() denotes a support for a plurality of grind ing tools, said support being carried by a carrier block 11 which is slidably mounted on a standard 12 rising from a base 13 mounted on wheels 14. The entire apparatus is therefore made portable so that it can be readily moved about in the shop. The block 11 is adjustable on the standard 12 by a non-traveling screw 15 threaded through said block, and operable through bevel gears 16 by a hand-crank 17. The vertical adjustability of the block 11 enables the support 10 to be raised and lowered according to the height of the motor.

On one side of the slide block 11 is a projecting stud 18 on which is journaled a worm wheel 19 which is operable by a meshing worm 20l having its shaft 21 provided with a crank handle 22 for operation. f The shaft 21 is supported in bearings 21a on the block 11. From the outer face of the worm wheel 19, at the center thereof, projects lug 24 having an arcuate face, the medial portion of which has worm gear teeth 25 with which is in mesh a worm 26 carried by a shaft 27 which latter is connected by bevel gears 28 to a shaft 29 provided with a crank handle 30 for operation, as shown in Fig. 6. To the innerend of the support 10, or that end which faces the worm wheel 19, is bolted or otherwise rigidly secured a block 31 having a recess 32 to accommodate the worm 26 and also to straddle the lug 24 as clearly shown in Fig. 4. The block 3,1 is also curved to fit the curved face of the lug 24 on opposite sides of the gear teeth 25, and where the block laps the sides of the lug, it has arcuate slots 33. A bolt 34 passes transversely through the lug 24 and also through the slots 33.

Upon tightening up the nut 35 on the bolt 34, the support 10 is locked to the worm wheel 19 carried by the block 11, and-if said worm wheel is now operated, the support is tilted sidewise bodily or swung about a horizontal axis'to adapt the apparatus to motors of the V type. The support 10 can also be tilted endwise by operating the worin 26 after loosening the nut 35. This last adjustment is for the purpose of adapt-ing the apparatus to a motor which has slope from the front to the rear, or vice versa. It will therefore be evident that the apparatus is well adapted for operation on motors of all the generally prevailing types. The worm wheel 19 may be located by bolts 19N passing through arcuate slots 19b therein and into the block 11.

Fig. 1 of the drawings shows the apparatus equipped with four grinding tool units, but it will be understood that only one unit or any number may be employed. Each unit consists of the following parts:

A vertically positioned hollow cylinder 36 is rotatably supported by vertically spaced plates 37 carried by longitudinal rails 38, the latter, in turn, being supported by depending bracket arms 39 carried by the support 10. The plates 37 have bearing openings in which the cylinder 36 is journaled. Ball bearings 40 are provided, and the cylinder 36 has a thrust collar 41 engaging the upper bearing from above, and a second thrust collar 42 engaging the lower bearing from below, whereby longitudinal movement ofthe' cylinder is prevented.

The plates 37 supporting the cylinders 36 are adjustable in the direction of the length of the rails 33 in order that the spacing of the grinder units may be varied to correspond to the spacing of the valves to be operated on. For this purpose,'the rails 38 are slot-ted lengthwise, as shown at 43, and the plates 37 are clamped in adjusted position by bolts 44 passing through the same and through the slots.

ln each cylinder 36 is mounted for a reciprocatory movement in the direction of the length thereof, a plunger 45 having a longitudinal bore 46 to loosely seat-'a spindle 47 having an external spiral groove 48. To the lower end of the plunge-1' 45 isl screwed or otherwise rigidly fastened a collar 49 through which the spindle 47 also passes. The collar 49 carries radial pins 50 which extend into the groove 48. twill therefore be evident that the reciprocation of the collar 49 with the plunger 45 will impart an alternating rotary-motion to the spindle 47 if the latter is held against longitudinal travel, the collar acting as a traveling nut and the spindle a non-traveling screw.

For the purpose of holding the spindle 47 against longitudinal travel, its lower end where it passes through a bearing openinfr in the bottom of the cylinder 36, is reduced in diameter to'form an external shoulder' 5l whichv seats on a ring 52 mounted in said bearing over an annular scriesof anti-friction balls 53, a ball-bearing being thus had.

Below the cylinder end, the reduced portionv of the spindle is fitted with a collar 54 abutting against said cylinder end, said collar being secured by a cross pin 55.

Y The spindle 47 is tubular to slidably seat the upper end of the shank 56 of a chuck 57 y vcarrying the tool 58 whereby the valve to be ground is rotated on its seat. The shank 56 has a longitudinal slot 59 to clear the cross-pin 55, and below the bottom of the cylinder 36 it has a collar 60 between which latter and the collar 54 is interposed a coiled spring 61 which operates to hold the shank 56 advanced, but allows the same to be retracted to permit the valve being operated on to be lifted' off its seat. The shank 56 rotates withy thespindle 47, and hence the tool 58 receives an alternating rotary motion, the driving connection between the spindle and the shank being obtained by the cross-pin passing through the slot 59 of the shank. i

The tool 58 also receives a continuous slow rotary movement in one direction by the rotation of the cylinder 36, and in order that this motion of the cylinder may be transmitted to the plunger 45, said plunger and cylinder are connected by spline 62.

The reciprocatory motion of the plunger 45 is obtained by an eccentric 63 having its strap 64 connected by a rod 65 to the plunger. To the upper end of the plunger 45 is fitted a socket nut 66 receiving the lower ball-end 67 of the rod 65. The eccentric 63 is on a shaft 68 and it is adjustable on said shaft in the direction of the length thereof to permit the hereinbefore described adjustment of the cylinders 36 to vary the spacing thereof, it being understood that each grinder unit is provided with an eccentric.

The continuous rotary motion of the cylinder 36 is obtained by fitting the same with a' worm gear 69 with which meshes a worm 70, which latter-is carried by a shaft 7l on which it is longitudinally adjustable fo'r the same reason as the eccentric 63.

The eccentric shaft 68 is Vsupported in bearings at the ends of the support lO, and

one of the bracket arms 39 carries bearings' 72 for the worm shaft 7l. This bracket arm also carries bearings 73 for a shaft 74 fitted with a lifter cam orl tappe-'t 75 for each grinder' unitsaid tappet being positioned'toV engage the collar from below. The tappetseare also adjustable along their shaft for the same reason as the eccentricsr 63.

The shafts 68, 71 and 74 are driven byV an 4 electric motor 76 carried by the support 10. As shown in Fig. 1, the motor is belted to shaft 68, and this shaft is belted to the shaft 7l, and the last-mentioned shaft is belted to the shaft 74. It will be understood, of course, that any other driving connections may be provided.

When the machine is in operation, the lvalve is given arapid alternating rotary motion'on its seat, and also a slow continuous rotary motion in one direction. This compound motion vevenly distributes the grinding compound, and prevents the formation of scratches running around the entire circumference ofthe valve and its scat. The valve is also lifted from its seat periodically in order that there may be obtained an even distribution of the abrasive material. VThe tool 58 is madeV to remain operatively connected to the valve by the common expedient of applying to the latter a spring which tends to lift the same. Y

I claim: g

l. A valve grinding machine comprising a supporting member having means whereby the same may bek adjusted about a horizontal axis and providedwith an axial extension having teeth, a to'ol carrying member having a pair of side members adjustably connected to said axialextension, and a gear meshing with the teeth on said extension, said'gearV and said teeth forming a means whereby to adjust the tool carrying member about a horizontal axis at right angles .to the axis of said supporting member.` Y

2. A valve grinding machine comprising a supporting member having means whereby the same may be adjusted about a horizontal axis and provided with an axial extension, a tool carrying member having a pair of side members adjustably connected to apposite sides of said axial extension, and means associated with said tool carrying member and said axial extension for adjusting said tool carrying member about a horizontal axis at right angles to the axis of said supporting member.

3. In a valve-grinding apparatus, a cylinder, means for rotating said cylinder, a reciprocatory plunger in the cylinder and connected thereto to turn therewith, means for operating the plunger, a non-traveling screw, a nut on the plunger and engaging the screw for imparting an alternating rotary motion thereto, and tool-holding means carried by the screw.

4. In a valve-grinding apparatus, a cylinder, means for rotating said cylinder, a reciprocatory plunger in the cylinder and connected thereto to turn therewith, means for operating the plunger, a non-traveling screw, a nut on the plunger and engaging the screw for imparting an alternating rotary motion thereto, and tool-holding means carried by the screw and slidable relative thereto in the direction of the length thereof.

5. In a valve-grinding apparatus, a cylinder, means for rotating said cylinder, a reciprocatory plunger in the cylinder and connected thereto to turn therewith, means for operating the plunger, a non-traveling screw, a nut on the plunger and engaging the screw for imparting an alternating rotary motion thereto, tool-holding means carried by the screw and slidable relative thereto in the direction of the length thereof,v

and resilient means normally holding the tool-holding means advanced.

6. In a valve-grinding apparatus, a cylinder, means for rotating said cylinder, a reciprocatory plunger in the cylinder and connected thereto to turn therewith, means for operating the plunger, a non-traveling screw, a nut on the plunger and engaging the screw for imparting an alternating rotary motion thereto, tool-holding means carried by the screw and slidable relative thereto in the direction of the length thereof, resilient means normally holding the tool-holding means advanced, and a lifter periodically engageable with the tool-holding means.

7. In a valve-grinding apparatus, a toolholder, means for imparting thereto an alternating rotary motion and simultaneous with such motion a. constant rotary motion in one direction, and means for periodically lifting the tool-holder.

S. In a Valve grinding apparatus, the combination of a standard, a block adjustably mounted on said standard, a tool support carried by said block, a cylinder rotatably mounted on said tool support, means for rotating said cylinder, a reciprocatory plunger in the cylinder and connected thereto to turn therewith, means for operating the plunger, a non-traveling screw, a nut on the plunger and engaging the screwfor imparting an alternating rotary motion thereto, and tool holding means carried by the screw.

9. In a valve grinding apparatus, the combination of a standard, a block adjustably mounted on said standard, a tool support carried by said block, a cylinder rotatably mounted on said tool support, means for rotating said cylinder, a reciprocatory plunger in the cylinder and connected thereto to turn therewith, means for operating the plunger, a non-traveling screw, a nut on the plunger and engaging the screw for imparting an alternating rotary motion thereto, and toolholding means carried by the screw and slidably relative thereto in the direction of the length thereof.

10. In a valve grinding apparatus, the combination of a standard, a block adjustably mounted on said standard, a tool support carried by said block, a cylinder rotatably mounted on said tool support, means for rotating said cylinder, a reciprocatory plunger in the cylinder and connected thereto to turn therewith, means for operating the plunger, a non-traveling screw, a nut on the plunger and engaging the screw for imparting an alternating rotary motion thereto, tool-holding means carried by the screw and slidable relative thereto in the direction of the length thereof, and resilient means normally holding` the tool-holding means advanced.

l1. In a valve grinding apparatus, the

combination of a standard, a block adjustably mounted on said standard, a tool support carried by said block, a cylinder rotatably mounted on said tool support, means for rotating said cylinder, a reciprocatory plunger in the cylinder and connected thereto to turn therewith, means for operating the plunger, a non-traveling screw, a nut on the plunger and engaging the screw for imparting an alternating rotary motion thereto, tool-holding means carried by the screw and slidable relative thereto in the direction of the length thereof, resilient means normally holding the tool-holding means advanced, and a lifter periodically engageable with the tool-holding means. i

In testimony whereof I afiix my signature. 

